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Finding the Fourth Proportional to 720,896.84, 994,794.90 and 398,581.64

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Solution

The fourth proportional to 720,896.84, 994,794.90 and 398,581.64 is: 550,019.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,896.84 : 994,794.90 = 398,581.64 : x
  2. Step 2: Convert to fraction form
    720,896.84/994,794.90 = 398,581.64/x
  3. Step 3: Cross multiply
    720,896.84x = 994,794.90 × 398,581.64
  4. Step 4: Simplify right side
    720,896.84x = 396,506,982,705.64
  5. Step 5: Solve for x
    x = 396,506,982,705.64/720,896.84
  6. Step 6: Final answer
    x = 550,019.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.